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Bug 228623 - FR: i8xx_tco support for Intel 6300ESB Watchdog timer
Summary: FR: i8xx_tco support for Intel 6300ESB Watchdog timer
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.4
Hardware: i386
OS: Linux
Target Milestone: ---
: ---
Assignee: Jason Baron
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2007-02-14 00:29 UTC by George Akimov
Modified: 2013-03-06 05:59 UTC (History)
2 users (show)

Fixed In Version: RHBA-2007-0791
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-11-15 16:20:12 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0791 normal SHIPPED_LIVE Updated kernel packages available for Red Hat Enterprise Linux 4 Update 6 2007-11-14 18:25:55 UTC

Description George Akimov 2007-02-14 00:29:11 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20061206 Firefox/

Description of problem:
This feature request is about adding support for 8086:25ab PCI device (Intel 6300ESB Watchdog Timer) to i8xx_tco module. I found simple patch for that, applied it and recompiled the kernel. It works. The patch is at

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. modprobe i8xx_tco on any Intel 6300ESB mobo (Tyan S2198 in my case)

Actual Results:
FATAL: Error inserting i8xx_tco (...): No such device

Expected Results:
Kernel module loads and /dev/watchdog gets created

Additional info:

Comment 2 Jason Baron 2007-02-28 21:29:55 UTC
ok i've added just the PCI id to this driver, can you please try the test
kernels at: and let me know how they
work. thanks.

Comment 3 George Akimov 2007-02-28 22:43:19 UTC
Installed and loaded "modprobe i8xx_tco" on Tyan
S2198 mobo. Dmesg reports:
"i8xx TCO timer: initialized (0x0460). heartbeat=30 sec (nowayout=0)"
Ran "echo '1' >/dev/watchdog; while ((1)); do date; sleep 1; done"
Hardware reset happens in 60 seconds, not in 30 as I expected. Maybe it takes 2
missing heartbeats? In any case, thanks, it works for me.

Comment 4 RHEL Product and Program Management 2007-06-20 15:36:15 UTC
This request was evaluated by Red Hat Kernel Team for inclusion in a Red
Hat Enterprise Linux maintenance release, and has moved to bugzilla 
status POST.

Comment 5 Jason Baron 2007-06-20 19:39:53 UTC
committed in stream U6 build 55.10. A test kernel with this patch is available

Comment 7 Don Domingo 2007-08-24 03:50:27 UTC
added to RHEL4.6 release notes under "Kernel-Related Updates":

Intel 6300ESB Watchdog timer is now supported

please advise if any revisions are necessary. thanks!

Comment 9 errata-xmlrpc 2007-11-15 16:20:12 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

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